Process of making perfumed or medicated transparent soaps



-oft'h'e soap, when the soap'becomesidryby- Patented May 3, 1927.

PAUL VILLAIN OF LONDON, ENG IIAND.

PnooEss or MAKING PERFUMED OR ivrnnroarnn TRANSPARENT soars.

N0 Drawing. Application filed October '31, 1924, Serial No.747,113,21n'dii1 Great Britain November 7, 1 1923.

The object of my invention is to produce transparent soap containing avery high percentage of perfume, natural or artificial, or ofdisinfectant, or of other chemical ingreclients of'me dicinal value(such as capsicum, menthol, camphor, iodine or the like), withoutalteration in the detergent or trans parent character of the soap or theadded perfumeor disinfectant .or chemical ingredient hereinbeforereferred'to, which is retained in the soap. Practically I produce atransparent solidified perfume having detergent properties.

Accordingto this my invention, I add-to the "hot soap a mixture of equalparts of methylated spirit and one or'a mixture of "the above namedperfumes, medicaments or ,dismfectants, and then a soluble form ordezriva'tive o'f QCllHlOSG, for example,-viscose, for' the purpose offorming on the surface exposure to air, av film' orcoating, whichcauses'th-e perfume-or disinfectant or chemical ingredient, hereinbeforereferred to, in the soap to be retained. In my-invention I useterpeneless oils, aromatic alcohols, esters or other natural orartificial perfumes or to, to make a perfumed or medicated ordisinfectant transparent soap, or a solid perfume having detergentproperties. In order to achieve the objects above named, I have, afternumerous experiments, found that the harder, purer and brighter thefats, and purer and brighter the oils, lyes and solvents respectivelyemployed, the harder, clearer and purer will be the soap.

The proportion of essential oils, synthetic perfume, or other suitablechemical ingredient hereinbefore referred to which can be incorporated,is in direct relation to the hardness of the soap.

In the process of manufacture, steps must be taken to preventcrystallization and ensure that the soap remains colloidal. The pan ispreferably enamelled inside, and must be absolutely clean, as must allother utensils also. No appreciable carbonate, sulphate, or silicate ofsoda'or of potash, or sugar, must be present, nor any inert orcrystallizable substances, such as calcium carbonate or sulphate, chinaclay, talc, and the like. i

The fats and oils may be saponified by any of the Well-known processes,the resultlated spirit, and sapon'ification effected by means ofthis,;in which case thesoap maybe utilized immediately for making mytransparent soap after allowing to stand for two hours. 7

The component parts Ifind Preferably sucha soap "as prepared above stransferred to .an lron or steel enamell'ed pan. fitted with a closed:"steam coil or toa steam'jacketed pan, orbetter,-tofian ordinary ironstill, with a condenser att-ached',to recover part of the solvent andperfume composition, when added. This has no influence on the worklngtemperature, but may prevent accident. For every 100 lbs. of chemicallngredients hereinbefore referred soap, as hereinbefore described, 25%of industrial methylated spirit is put in the pan with the soap, steamturned on, and the mixture heated up to 80 (1, then raised gradually to97? C. When the soap reaches 97 (3., allow to boil for a few minutes,then shut off steam, add 10 lbs. of pure glycerine (sp. gr. 1260) per100 lbs. soap, stir well in, and allow to stand for two hours, when itwill cool to about 80 C. (it should not be best forthe base of such asoap are: i v

' v Parts. TZIllOW Q r 55 Coconut oil (Cochin); '25 Palmoil (bleached)'10 -Rosin (pale) 1 1O allowed. to cool below 72 (1). Samples must betaken from time to time to ascertain the consistency and transparency.

The soap is now ready for additionof' the perfume, disinfectant, orother natural or artificial perfumes or chemical ingredients,

hereinbefore referred to, suitable for admixture with a colloidal soap,such as essential oils, terpeneless oils, aromatic alcohols, aldehydes,phenols, esters, or other natural or artificial perfumes, coal tarderivatives, or other chemical'substances, hereinbefore referred to,(with the-exception of essential oils rich in terpenes, artificial orsynthetic products of a crystallizable nature, or aromatic gums, orbalsanis). Any quantity, i

say 33 per cent. of such a perfume as just described or of disinfectant,or of other hot soap, stirred well in,

- able odorous chemical ofmedicinal value, is mixed with a smallquantity, from 1% to 5% of a soluble form or derivative of cellulose,for example, viscose, cellulose acetate, butyrate, or aceto butyrate.Cellulose acetateis specially suitable, owing to its ready solubility inmost essential oils, alcohols and esters. The predetermined perfumemedicament or disinfectant mixed with the same proportion by weight ofmethylated spirit and the celluloseacetate in the proportions describedform a mixture, the whole of which on being warmed up to 80 6., ,is thenadded to the and left in the still or pan for only a few minutes. Whencooled to about 72 (3., the soap is run 05 into frames or moulds, andleft to cool slowly-the longer the cooling takes, the

more transparent will be the soap.

I claim: v

1. A process of making transparent soap and providing the samehomogeneously with a protective film when dry, comprising the steps ofadding to a hot transparent soap mixture a large quantityof-non-crystalliza film-forming soluble cellulose derivative; heatingthe resultant mixture to about 80 C.; partially cooling said mixture toabout 72 C.; running the partially-cooled mixture into frames to formtablets; and leaving it I fluid products and methylated spirit in equalparts and a small quantity of able fluid products.

to cool slowly in air, whereby the soluble film-forming cellulosederivative will appear as a thin coating over the soap tablets to retainthe odorous products therein until liberated by washing with water,whereafter the coating is re-formed by drying in air.

2. A process according to claim 1, which the odorous products andmethylated spirit are added in the proportion of about 38%, and thesoluble film-forming cellulose derivative in the proportion of 1 to 5%.

3. A process oi making transparent soap vand providing the samehomogeneously with a protective. film when dry, comprising the steps ofadding to ahot transparent soap mixture a large quantity ofnon-crystallizable odorous fluid products and methylated spirit in equalparts and a small quantity of cellulose acetate; heating the resultantmixture to about 80 (3. running the partiallycooled mixture into framesto form tablets; and leaving it to cool slowly in air, whereby thecellulose acetate will appear as a thin coating over the soap tablets toretain the ,odorou's product therein until liberated by washing withwater, whereafter the coating is re-formed by drying in air.

4. A process according toclaim 1, in which the odorous terpeneless oilsand armoatic non-crystalliz- PAUL VILLAINQ fluid products includearomatic

